MULTILAYER SHEET EXTRUSION

A high volume plastics manufacturing process

Multi-layer sheet extrusion is a high volume plastics manufacturing process that involves mono or multi-layer co-extrusion of up to 13 layers of plastic. Co-extrusion is the application of one or more layers on top of a base material with the objective of adding properties such as UV-absorption, texture, energy reflection, oxygen and gas barrier, etc.

Multi-layer sheet extrusion involves thermoforming whereby plastic sheet is heated until soft, and formed via a mould into a new shape. Common materials include PET, high-density polyethylene, polystyrene and ABS (Acrylonitrile Butadiene Styrene).

Sheet is differentiated from film by its thickness - with sheets over 0.25mm thick being considered a sheet. Thinner plastic sheets are generally thermoformed into plastic trays, clam shells, bowls or cups.

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